I've had Sims 3 for a while now, and I'm loving it. Surprisingly, it runs rather well on my computer.
Here's a few shots of my legacy family:

Legacy founder Casey Brooke.
(traits: Ambitious, Workaholic, Computer Whiz, Heavy Sleeper, Good Sense of Humour)

Casey the Second.
(traits: Athletic, Loner, Ambitious, Excitable)

Casey the Third.
(traits: Good, Brave, Ambitious, Hates the Outdoors)

Casey III's twin sister Melissa.
(traits: Friendly, Light Sleeper, Good Sense of Humour, Vegetarian)
(click thumbnails to enlarge)
I've also got a picture of
Casey I comforting Casey II from beyond the grave.
Casey III and Melissa are teenagers now, unfortunately they're both butt-ugly. I'm just hoping they'll grow into normal-looking adults.
As you can guess, Ambitious is my family trait. I've decided to use it only for heirs, though; spares are fully randomised to have more variety. It's a shame both third gen kids rolled such boring traits.